This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A338072 #12 Oct 21 2020 03:44:03 %S A338072 2,3,1,1,7,4,1,3,1,1,7,1,6,3,2,3,7,9,1,9,7,2,4,1,2,9,3,7,5,9,1,9,3,2, %T A338072 2,7,2,2,9,2,3,9,4,3,9,9,2,9,3,3,7,2,5,7,1,4,4,7,5,0,9,1,9,2,9,3,1,7, %U A338072 2,3,1,6,1,9,9,3,7,1,7,9,3,6,7,2,5,1,1,0,6,3,4,2,4,1 %N A338072 Concatenation of the digits of A083758. %C A338072 This is the beginning of the decimal expansion of the very large primes defined in A083758 and A083759, read from left to right. %e A338072 The primes are: %e A338072 2, %e A338072 23, %e A338072 2311, %e A338072 23117, %e A338072 2311741, %e A338072 231174131, %e A338072 23117413117, %e A338072 23117413117163, %e A338072 2311741311716323, %e A338072 ... %e A338072 23117413117163237919724129 %e A338072 ... %e A338072 2311741311716323791972412937591932272292394399293372571447509192931723161993717936725110634241 %e A338072 ... %Y A338072 Cf. A033308 (the Copeland-Erdős constant), A083758, A083759, A338073. %K A338072 nonn,base %O A338072 1,1 %A A338072 _N. J. A. Sloane_, Oct 20 2020